The Jordanelle Islands consist of a series of small, rocky submerged structures located approximately 200 metres from the shore of Deer Creek Reservoir. These formations provide the most notable underwater topography in the reservoir. Divers and snorkellers can expect depths ranging from 3 to 6 metres, with an average of 5 metres. Access to the site requires a boat. Conditions include mild currents and visibility between 3 and 6 metres. Water temperatures remain consistently cold, ranging from 4 to 24 degrees Celsius depending on the season, necessitating the use of a wetsuit. Hazards include boat traffic, cold water, entanglement risks, and low visibility.

Hailstone Swim Beach at Deer Creek Reservoir offers a designated, roped-off wakeless zone suitable for beginner snorkelers. The site features a sandy shore entry, providing a controlled environment for those new to the activity. Facilities available at the location include parking, toilets, showers, and equipment rental. Divers and snorkelers should remain aware of potential boat traffic in the surrounding reservoir waters and prepare for cold water temperatures. The site is managed as part of the local state park infrastructure, ensuring accessible entry points for visitors.

Ross Creek is a quiet, non-motorized section located on the northern arm of Deer Creek Reservoir. This freshwater site features shoreline drop-offs and reef-like topography, making it suitable for beginners. Snorkellers can expect depths ranging from 2 to 6 metres, with an average of 4 metres. Entry is via the shore. Conditions are generally calm due to the lack of boat traffic, though visibility is variable, typically between 3 and 6 metres. As a high-elevation, mountain-fed lake, water temperatures fluctuate significantly between 4 and 24°C. Wetsuits are recommended for comfort. Hazards include potential entanglement and low visibility. Facilities at the site include parking and toilets.

The Homestead Crater is a unique geothermal cave site located near Deer Creek Reservoir. This freshwater crater features water temperatures consistently between 32 and 35.5 degrees Celsius year-round. Divers and snorkellers access the water from the shore, exploring depths ranging from 3 to 14 metres with an average depth of 12 metres. Visibility typically spans 10 to 15 metres. As the site sits at an altitude of approximately 1,830 metres, it is classified as an altitude dive. Facilities on-site include parking, toilets, showers, changing rooms, air fills, equipment rental, and a dive shop offering guided tours. Reservations are required for all diving activities.

Deer Creek Reservoir offers a shallow shore dive featuring both natural reef and artificial reef structures. With depths ranging from 1 to 4 metres and an average of 2 metres, this site provides a practical environment for beginner divers. Visibility typically fluctuates between 3 and 10 metres. Divers should be aware of potential boat traffic and use a marker buoy at all times. Shore entry requires caution due to the presence of surf and shore break. Water temperatures can drop to 7°C in early spring, necessitating appropriate exposure protection. On-site facilities include parking, toilets, and showers to assist with dive logistics.

North of Island, also known as Hidden Ledges, is a freshwater site located in Deer Creek Reservoir. The topography consists of submerged rock piles and old riverbed structures. Divers and snorkellers can expect depths ranging from 8 to 18 metres, with an average depth of 15 metres. Conditions are variable, with visibility between 2 and 10 metres and mild currents. Thermal stratification and inflows can create cooler pockets of water, even during summer months. Access to this site requires a boat. Hazards include boat traffic and cold water. Facilities available at the reservoir include parking, toilets, showers, changing rooms, a rinse station, a cafe, and boat charter services.

Deer Creek Island, located within Deer Creek Reservoir, offers a freshwater snorkeling experience around its perimeter. The site features rocky structures, particularly on the western side, which provide cover for local fish populations. Depths at the island range from 1 to 7 metres, with an average depth of 4 metres. Visibility typically fluctuates between 3 and 10 metres. Water temperatures vary significantly due to stratification, ranging from near freezing in winter to the low 70s °F (23°C) at the surface during summer. Access is available via both shore and boat, and the site is suitable for beginners.

Deer Creek Reservoir at Rainbow Landing offers a shallow, shore-entry dive suitable for beginners. The site features depths ranging from 1 to 3 metres with an average of 2 metres and visibility around 5 metres. Divers can explore the area year-round, with night diving also permitted. Due to the high-altitude location, water temperatures vary significantly, reaching 18-24°C in summer while approaching freezing in winter. Thermal protection is recommended for all dives. Hazards include cold water and frequent boat traffic; divers should maintain a constant lookout for vessels and remain close to the shore to minimise exposure to passing boats.